Internal-combustion engine.



NJB. SJMPSON.

INTERNAL UOMBUSTION ENGINE.

APPLIOATIOH FILED AUG. 23, 1912.

Patsnted 00V?, 15H3.

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r EQ clontrolledby valves adapted to be quickly' vtion, taken inconnection with the accom- 'ball bearings 2O and 21. The bearing 2O isentran enanas narrar orion NaPoLnoN B. SIMPSON, 0F vroXBoRo,iuaSsnoniisn'r'rsy. AssIGNon on FoRTY-NINE ONE-HUNDREDTHS To MARSHALL'i'. DAVIDSON, or BnooKLYN, NEW YORK.

INTERNAL-COMBUSTION ENGINE.

To all whom it may foin-ern ylie it known that I, NiuoLnoN I3. Sitirsox,a citizen of the United States, and resident of I `o.\boro. county ofNorfolk, State ot.' iil'assachusetts, have invented a certain new anduseful Improvement in Internal-Combustion Engines, of which thefollowing is a specification,

This inventionvrelates to internal combustion engines and moreparticularly to the construction and arrangement oi' the valvesforcontrolling the admission and the exhaust of the motive fluid.

One of the objects ot' the invention is to provide an engine havingpractically unrestricted inlet and exhaust ports which are and fullyopened and closed and also `adapted to automatically compensate for wearand expansion and contraction.

Another object of the invention is to provide a valve construction inwhich the valve is always maintained in its central position. Otherobjects and the features of novelty will be apparent from the followingdescrippanying drawings, in which,

Figure 1 is a longitudinal section through a portion of the cylinder ofan internal combustion engine embodying the invention; Fig. 2 is asection onthe line 2-2 of F 1 looking in the direction of the arrow. y

Referring to the drawings, 1U indicates the cylinder in .which is4arranged a piston 11.A The cylinder is provided with an integral head 12and a water jacket 13. An inlet portv 14C extends through the Wateriacket and communicates with a cylindrical valve chamber15 arranged .atthe end ot the cylinder and extending at right angles to the axisthereof.` On the opposite sldeof the cylinder from the pori- 14 is anexhaust port 16 which communicates with a valvechamber 17. An inletvalve 18 is arranged in the chamber 15 and is adapted to close the port14, as willbe clearly' seen from Fig. 1. A similar valve 19 is arrangedin the chamber 17 and is adapted to close the port 1G. The valves A18and 19 are preferably in the form of cylindrical segments formedintegral with their stems, the latter being supported in carried by a'threaded sleeve 22 which is screwed into the cylinder casting andlockedA in position by means of a lock nut 23. The

Specification of Letters Patent.

raieinea oci-.a3- rois.

Application filed August 23, 1 912. Serial No. 716,769, y

bearing Q1 carried in a suitable recess in the cylinder casting and thc'inncr'races of thebearings Q0 and 21 are preferably oi:

-conical torni so that by adjusting thesleeve 22 auxv near producinglateral play inthe bearings may be taken up and the valve stemmaintained in-its central position. At the ends of the valves-18 and 19are arranged lava washers Q4.- and 25 which are adaptedto prevent thegases troni bearings Q0 and Q1. n

In order to provide a. valve which is selfadj'usting to take up weareither on the surface of the valve or on the seat and also compensate.for expansion and contraction, I .have provided longitudiliallyextending slots 2G and 27 which extend irom the sides of the cylindricalsegments to about the medial line Ithereof and are preferably instaggered relation as shown. The slots 26 and ifi' are cul in the valveattei'the saine has been made and cause the outer portions of the valveto spring against the scat, thus getting into the avoiding the use ot'Yseparate` facing and readily observed from the drawings permits of theuse of ports of large capacity and also avoids the use ot springs andother devices for holding` the 'valves against their seats. It lwillalso be observed that the lvalve. chambers are in direct communicationwith the interior' of the cylinder and that by having the valves seatagainst the outer sides of the valve chambers the pressure of the gaseswithin the cylinder will holdl the valves against their seats and thusaidv in,

preventing leakage.

Any suitable mechanism may be provided for oscillating the valves andasthis featureofthe engine forms no part of the present invention I haveomitted a description of the same.

Having described my invention WhatI claim and desire to secure byLetters Patent is- 1. In an internal combustion engine, a cylinder, avalve chamber communicating with the interior of said' cylinder, a portadapted to connnnnicatc with said Valve chamber, a valve for closing`said port and comprising a portion having' a surface in the form of asurface of' revolution fitting aoV ythe interiorof said chamber, and astein formed integral with said portion, said portion having slotstherein extending in the direction' of the axis of said stem as land forthe purpose described'.

' 9. In an internal combustion engine, a cylinder, a cylindrical valvechamber coininunicating withl the interior of said cylinder, a portadapted to'commiinicate with said chamber, a valve litting on theinterior of said chamber and adapted to close said port, a stein forsaid valve, and means for holding said stem against lateral movement,said valve having a slot extending in the direction' of the axis of ,thestem whereby the portion of the val've fitting said chamber is heldagainst the same by the elasticity of the materialr of which the valveis made.

3. In an internal combustion engine, a

cylinder, a cylindrical valve chamber com-' municating with the interiorof said cylinder, .a port adapted to communicate with said chamber and avalve for closing said port, said valvefhavi'ng a stem and a seatportion, the' latter fitting the Wall of .said

chamber, .and slots cnt in the seat portionv of the valve and extendinglongitudinally thereof, whereby 'the seat portions 'are sprung againstthe .Wall of said chamber by the 'elasticity ofthe material of which they valve lis lmade.

`4:. In an internal" combustion engine, 'a valve chamber having a portiii communication therewith, and a valve for said port ipv-5,1 en

said chamber, and adapted to be rocked on. the axis of @id seat portion,said valve having .flots inits surface on opposite sides of the valveand arranged in staggered relation. l

6. In an internal. combustion engine, a cylinder, a piston therein,-cylindrical valve chambers at one end of said cylinder, each vbeing incommunication with the cylinder and having a port in communicationtherewith, and a valve in each of said chambers thechamber and providedwith slots extending inthe direction of the axis of the valve,

Said slots being arranged on opposite sides of the val-ve and instaggered relation.4

Intestimony whereof I ailix my signature in presence of two witnesses.

NAPOLEON B. SIMPSON. Witnesses:

lBil/i. KENT, v

ARTHUR L. BRYANT.

'comprising a segmental seat portion fitting

